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RE: Cement Certifications/C1157[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Cement Certifications/C1157
- From: "Sherman, William" <ShermanWC(--nospam--at)cdm.com>
- Date: Fri, 13 Oct 2000 09:49:11 -0400
Harold Sprague wrote: > The best option is to drop the C150 all together and switch > to the C1157 specification and performance specify the cement. There are > a lot more options in the C1157 as opposed to the C150. You can fine > tune the heat of hydration performance aspect. Harold, I have only recently become familiar with the C1157 standard and I am confused with how it offers "a lot more options" than C150. Regarding heat of hydration, both specs seem to have similar limits for low or moderate heat of hydration cements. I don't see many more options for the engineer just more options for the supplier, since C1157 states "there are no restrictions on the composition of the cement or its constituents". Have you or other engineers on the listserver specified this cement yet? While "performance standards" make sense for some things, I have trouble with the idea of not having any restrictions on composition of a product with such a long history of use and development. This standard also places responsibility on the engineer for "safety and health practices" and "regulatory limitations" when using this cement. It would seem the engineer is buying into a lot of liability. Frankly, I find this standard just plain "scary".
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